As described by our sister site Deadline, Outrider is a mystery set in the Oklahoma Indian Territory in the late 1800s, following a deputy who partners with a ruthless Federal Marshal to apprehend a legendary outlaw in the wilderness. Schwarzenegger would play the Marshall, who emigrated to the U.S. from Europe.

Interestingly, this news comes a day after word broke that Amazon was developing a TV adaptation of Conan the Barbarian, which Arnold of course famously starred in on the big screen once upon a time.